Patrick s



@glatten grattaatjmt fitte.

Letters .Patent No. 77,012, dated April 21, 1868.

IMPROVBD-MATERAL FOR JOURNAL-BOXES.

felge .Srlgcbnlc refont tu in tips@ tettets ateut ma 'mittag aut at tigt 5mm.

TO -ALL WI-IOM IT-MAY CONCERN:

Be it known that I, PA'IRICKS. DEVLAN, of Hudson City, in the county of Hudson, and State of New- Jersey, have invented a new and useful Improvement'inAntiFriction Journal-Boxes, and material therefor; and I dov hereby declare that the following is afull, clear, and exact description thereof, which will enable others skilled in the art lto make and use the same, reference being had to the accompanying drawings, forming -part of this specification. I

Figure 1 is a top view of my improved journal-box. y Figure 2 is a'detail cross-section of thesame, taken through the line :v x, iig. 1'.

.Figure 3 is a sectional viewl of a portionof the anti-friction material before being cut up to be put into thejournal-box.

Similailetters of reference indicate corresponding parts.

My invention has for its object to furnish :1n-improved anti-friction journal-box, which shall be so constructed and arranged that the anti-friction material or part of said box may be conveniently replaced, when worn, by fresh material; vand it consists in the anti-friction material, and in the manner in which it is inserted in thejournahhpx, as hereinafter more fully described. I

A.A is the journal-box, in the concave or friction-,surface of which are formed chambers or cavities, of any desired number or size, and which may be square, round, oirof any other desired form.- B is the anti-friction material, which is formed by'iinpregnating the fibres of paper, felt, cloth, leather, or other suitable vegetable or animal fibrous material with pulverized plumbago, soapstone, or other ne earthy matter, and fixing it by -means'of the silicate of soda, potash, or other strong'size, inthe manner hereinafter described. In case paper is used, 1 prefer to unitethcanti-friction ingredients with it when 4in the form of pulp. The paper-stock is prepared in the usual way, and washed perfectly clean from all dirt or grit. Then, while the pulp is in tho M. uw

paper-engine, I put into it about twenty-five per cent. of pulverzed plunibago, (graphite,) or about the same quantity of pulverized soapstone, (stcatitc,) or of any ine earthy mattei'. After it is thoroughly mixed with the paper-pulp, I add about twenty-five per cent. of silicate of soda, or pots-sb, or any other strong size. yThe pulp thus preparedis then passed over the rollers in the samev manner as when making ordinary paper orpast'eboard.

The material is then cnlendered between rollers to the required thickness.

In case cloth, felt, or leather is used as the base or foundation of the anti-friction material, I saturate the cloth, felt, or leather in a niixtnre formed by mixing plumbago, or soa-pstone, or other fine earthy matter with a'solution ci' silicate of soda, or potash, or other strong size, in theproportions above described.

The material is then dried and ealendered 'to the required'thickness.

`vThe anti-friction material is prepared for -use by cutting the sheets into pieces or blocks b', of a shape arid size 'to t inte the chambers lor cavities formed in the `journal-box byineans of dies or punches. The pieces or blocks Zr thus prepared and cut ont are placed in the chauibers'or cavities of the journal-box, andthe box is ready for use. When worn, the blocks Z1 are readily removed, andreplaced with new ones, making the journalbox very convenient. and lcilieient, and enabling itto be kept in properA condition at trilling expense.

It should he observed thatpaper may also'be impregnated with the anti-friction ingredients in the manner last described, but, in the case of paper, I prefer the manner of'fprep'aration first described.

I claim as new, and desire to secure by Letters Patentl. Forming the anti-friction material for lining journal-boxe s,ef the ingredients, in the mann-er, and bythe means herein described, and. cutting the same by dies or withpunches into the required shape, as set forth.

2. The lining for journal-boxes composed of fibrous' material impregnated-with pulverized plumbago, soapstone, or` other ear-thy matter vfixed with a strong size, and rolled and cut bydies or punching into 'the required shape, substantially as herein shown and described. l l

The above specification of my invention signed byme, this 11th d ay'of February, 1868.

' PATRIcK s. DEVLAN.

Witnesses:

' WM. F. MeNAMAnA,

JAMES T. GRAHAM. 

